Please read the description below to make sure you have measured correctly to ensure the perfect fit for your pet. Collars are handmade according to the size based on the measurements of the head & neck area as these are slip on & non adjustable. These collars are made with 20mm sized acrylic beads in an array of finishes Swirl Colored Resin Bead Collars, Beads, Colorful, Beaded Dog Collar, Durable, Lightweight, Slip On, Spring Colors